2018/3/10 14:07:43来源:新航道作者:新航道
摘要:雅思写作是中国考生们的一大头疼科目,难以提高的科目.上海新航道雅思小编给大家分享关于雅思写作小作文高分范文-保温瓶奏效的信息,希望帮助考生对照写作范文研究真题,充分备考,争取理想成绩,实现留学梦想。
雅思写作是中国考生们的一大头疼科目,难以提高的科目.上海新航道雅思小编给大家分享关于雅思写作小作文高分范文-保温瓶奏效的信息,希望帮助考生对照写作范文研究真题,充分备考,争取理想成绩,实现留学梦想。
The information of how a thermos flask works.
雅思写作参考范文:
The diagram indicates the structure and working process of a thermos flask.
The thermos flask is used to keep the liquids and remain the temperature. Its most common use is to keep hot drinks, for example coffee, hot but you can also use it to keep things like milk cold.
A thermos flask is a cylinder-shaped object between 30 and 40 cm high. The inside of the thermos flask is a flask made of glass. There is nearly no air inside this glass, so it is a very poor conductor. In addition, the glass is silvered, which reduces infrared radiation. This vacuum flask is surrounded by another cylinder made of metal or plastic, which protects the fragile glass inside.
The top is a plug or cap, usually made of cork or plastic, which is covered by a plastic cup. This is taken off and used to drink the liquid from. Some heat escapes from the cap but the special design of the thermos flask means that liquid maintains its temperature for several hours.
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